Ineed is urgent ! which of the following statements applies to the motion of a ball rising and then falling in free fall? i. the ball has constant acceleration as it moves upward. ii. the ball has constant acceleration at the top of its path. iii. the ball has constant acceleration as it moves downward. a.i onlyb. iii onlyc. i and iiid. i, ii, and iii 

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?